Actually, quick question while I'm thinking about it.
I'm on holiday for five days end of August. Should I get timed light on of things (don't know what they are called, but hope you know what I mean) or just leave the tanks in total blackout for the five days? I'm not going to feed the fish, they will be alright I'm sure, but worried about the plants. Or will the five day blackout give them a good recovery time from the algae?